When you get a new computer, it runs fine. Over time, it can slow down and become infected. Microsoft offers a free tool that can protect your computers. It is called Windows Steady State. With Steady State, every time you restart your computer, the computer will return to its original, hopefully pristine, condition.
You can learn more at Microsoft’s Windows Steady State web page that includes a quick demo: http://www.microsoft.com/windows/products/winfamily/sharedaccess/default.mspx
Families especially can benefit from this tool. Your IT professional may even find a use for it in your office – especially as you start relying more on software as a service – running programs online.